For words that only have three letters, there is not any 4th letter. By way of example with the word “include”, there isn't any a lot more letters afterwards and therefore should be the word "increase". The word “addict” is from the BIP39 wordlist however you would have made use https://bookmarksparkle.com/story19031791/an-unbiased-view-of-bip39-seed-phrase-github